We evaluated the test-retest reliability for measures based
on the fibre orientation distribution (FOD) using constrained spherical
deconvolution (CSD). We derived measurements in the peak direction identified
from the FOD, and evaluated the test-retest reliability for these FOD peak
amplitudes using the intra-class correlation (ICC) coefficient. We visualized
the ICC coefficients on the FOD orientation plot. We compared the reliability
of measuring the FOD peak amplitudes and the fractional anisotropy (FA)
derived from the diffusion tensor imaging (DTI) model.